Logging all Soap request and responses in PHP

php, soap

Solution

I second Aleksanders and Stefans suggestion but would not subclass SoapClient. Instead I'd wrap the regular SoapClient in a decorator, because logging is not a direct concern of the SoapClient. In addition, the loose coupling lets you easily substitute the SoapClient with a mock in your UnitTests, so you can concentrate on testing the logging functionality. If you only want to log specific calls, you can add some logic that filters requests and responses by $action or anything you see fit.

Edit since Stefan suggested to add some code, the decorator would probably look something like this, although I am not sure about the __call() method (see Stefans comments)

class SoapClientLogger
{
    protected $soapClient;

    // wrapping the SoapClient instance with the decorator
    public function __construct(SoapClient $client)
    {
        $this->soapClient = $client;
    }

    // Overloading __doRequest with your logging code
    function __doRequest($request, $location, $action, $version, $one_way = 0) 
    {
         $this->log($request, $location, $action, $version);

         $response = $this->soapClient->__doRequest($request, $location, 
                                                    $action, $version, 
                                                    $one_way);

         $this->log($response, $location, $action, $version);
         return $response;
    }

    public function log($request, $location, $action, $version)
    {
        // here you could add filterings to log only items, e.g.
        if($action === 'foo') {
            // code to log item
        }
    }

    // route all other method calls directly to soapClient
    public function __call($method, $args)
    {
        // you could also add method_exists check here
        return call_user_func_array(array($this->soapClient, $method), $args);
    }
}

Problem

Does anyone know how to log all request and responses with the builtin SoapClient in PHP? I could in fact manually log everything with `SoapClient::__getLastRequest()` and `SoapClient::__getLastResponse()` But we have that much soap requests in our system that i'm looking other possibilities. Note: i'm using wsdl mode so using a method that tunnels all through to `SoapClient::__soapCall()` isn't an option

Original source